Tutorial by Examples: p

Finishing patches makes them permanent changesets. Finish first applied patch in the queue: hg qfinish Finish all applied patches in the queue: hg qfinish -a

To fold (combine) two patches: hg qnew firstPatch // Create first patch hg qnew secondPatch // Create second patch hg qpop // Pop secondPatch hg qfold secondPatch // Fold secondPatch with firstPatch

More than one queue may be created. Each queue can be thought of as a separate branch. hg qqueue --create foo // Create a new queue called "foo" hg qqueue --list // List all queues hg qqueue --active // Print name of active queue hg qqueue --rename bar // Rename active queue ...

If we want to test JavaScript on a website, we'll need to use something a bit more powerful than Goutte (which is just cURL via Guzzle). There are a couple of options such as ZombieJS, Selenium and Sahi. For this example I'll use Selenium. First you'll need to install the drivers for Mink: $ compo...

From documentation: The HttpContext.Items collection is the best location to store data that is only needed while processing a given request. Its contents are discarded after each request. It is best used as a means of communicating between components or middleware that operate at different poi...

A global RegExp match can be performed using preg_match_all. preg_match_all returns all matching results in the subject string (in contrast to preg_match, which only returns the first one). The preg_match_all function returns the number of matches. Third parameter $matches will contain matches in f...

The predicate function matches can be used to evaluate strings on the fly without use of any object declarations. IF matches( val = 'Not a hex string' regex = '[0-9a-f]*' ). cl_demo_output=>display( 'This will not display' ). ELSEIF matches( val = '6c6f7665' reg...

As already pointed out in other pitfalls, catching all exceptions by using try { // Some code } catch (Exception) { // Some error handling } Comes with a lot of different problems. But one perticular problem is that it can lead to deadlocks as it breaks the interrupt system when writ...

The latest version of the Oracle Java style guide mandates that the "then" and "else" statements in an if statement should always be enclosed in "braces" or "curly brackets". Similar rules apply to the bodies of various loop statements. if (a) { //...

Documenting your work Remember what you've done and retain long outputs which can't be kept in WinDbg's buffer. It's always good to have a log available for reproducing debugging steps, e.g. to ask questions on Stack Overflow. CommandPurpose.logopencreate a log file.logcloseclose the log file.dump...

Following are the Prerequisites for installing Cookiecutter: pip virtualenv PostgreSQL Create a virtualenv for your project and activate it: $ mkvirtualenv <virtualenv name> $ workon <virtualenv name> Now install Cookiecutter using: $ pip install cookiecutter Change dire...

This example finds a point on a bezier or cubic curve at position where position is he unit distance on the curve 0 <= position <= 1. The position is clamped to the range thus if values < 0 or > 1 are passed they will be set 0,1 respectively. Pass the function 6 coordinates for quadrati...

For more complex applications, flat execution profiles may be difficult to follow. This is why many profiling tools also generate some form of annotated callgraph information. gperf2dot converts text output from many profilers (Linux perf, callgrind, oprofile etc.) into a callgraph diagram. You can...

Google Perf Tools also provides a CPU profiler, with a slightly friendlier interface. To use it: Install Google Perf Tools Compile your code as usual Add the libprofiler profiler library to your library load path at runtime Use pprof to generate a flat execution profile, or a callgraph diagram...

The | can be used to have a single case statement match against multiple inputs to yield the same result: def f(str: String): String = str match { case "foo" | "bar" => "Matched!" case _ => "No match." } f("foo") // res0: String = M...

Given the following List of tuples: val pastries = List(("Chocolate Cupcake", 2.50), ("Vanilla Cupcake", 2.25), ("Plain Muffin", 3.25)) Pattern matching can be used to handle each element differently: pastries foreach { pa...

Hosted XSLT 2.0 Setup To run XSLT 2.0 in the browser, use one of the following XSLT 2.0 as a service hosts: XSLT Fiddle W3C XSLT Servlet Online XSLT Test Tool

PyKD is a WinDbg extension that enables you writing Python scripts. It's open source. Typically, the extension is not available side by side to any other DLL, so it is usually loaded with .load x:\full\path\to\pykd.pyd, where PYD is the extension for a python DLL, but you can rename it to DLL if yo...

The keyword partial can be used during type definition of class, struct, or interface to allow the type definition to be split into several files. This is useful to incorporate new features in auto generated code. File1.cs namespace A { public partial class Test { public string...

We're going to use the expression tree API to create a CalculateSalesTax tree. In plain English, here's a summary of the steps it takes to create the tree. Check if the product is taxable If it is, multiply the line total by the applicable tax rate and return that amount Otherwise return 0 ...